ERICO Practical Guide to Electrical Grounding - Manual (Page 47)

39 Chapter 2: Building Lightning Protection
12" x 12"
(1 Square Foot)
Fig. 2-35
Electrodes made from copper or steel plates are
often used in soil less than 12” thick.
Fig. 2-37
Two paths from the air terminals to the ground
electrode system are required.
Cable Behind Parapet
Cable On Top Of Parapet
Fig. 2-36
Lightning conductors and points may be mounted
on top of or behind the parapet of flat roofs.
Fig. 2-33
Detail of conductor through the roof.
Lightning
Conductor
8" Max.
Seal End Of Conduit
Final Thru-Roof Flashing
By Roofing Contractor
1" PVC Conduit
Cable And Conduit Down
To Ground
Fig. 2-34
Using a copper-clad rod welded to a pipe as an
air terminal.
1-1/2" IPS
3/4" C-Clad Rod
Pipe Cap
CADWELD Mold VVR18001
CADWELD W/M 2-#200
CADWELD TYPE SS (Prefab)
CADWELD TYPE GQ
Grounding Book 4/14/99 10/5/99 6:01 PM Page 39 (Black plate)